Malicious PDF — malware analysis report

Static analysis result for SHA-256 b703af697d18869a…

MALICIOUS

PDF

42.9 KB Created: 2020-08-19 01:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a03acbafcf3114013229972ca60545ea SHA-1: 6004f83b95cd7127bf32b04862471c798e63d104 SHA-256: b703af697d18869a4caf581b7056aec0714c04185c969b70b8c63b725d810159
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=cisco+asav+configuration+guide In PDF document text
    • http://files.jkcreative.co.uk/uploads/1/3/1/3/131380591/a92841.pdfIn PDF document text
    • http://gizofibe.bluemountainfarms.net/uploads/1/3/0/9/130969742/2520417.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3168/3484/files/web_development_full_course.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3653/1095/files/multiplex_pcr_procedure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/40735845594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/psychology_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/difibamegirexezamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0091/2283/files/winiselezovoled.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1033/2571/files/26897644569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/gijovagavimapovuloza.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C85 5120 bytes
SHA-256: 19577026d901bed3bafb4e7333426ab7297284f74300c6f90cc181fb45dfaa58
font_01_sfnt_off00006e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E02 10288 bytes
SHA-256: 086f69c2129f10c014cf68dfa82bebc060c218f9d384eaabd8d705ddeeca6c3d
font_02_sfnt_off000090ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90ED 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e